Dear Tarek,
The converter is using US 'dry gallon' units instead of liquid US gallons. That could be why it did not work. Here are the retail prices in Turkey (These are beyond comparison, lol):
Regular Gasoline: $10,60 per gallon/ $2,80 per litre
Eurodiesel: $10,12 per gallon (Very Low Sulphur Diesel)/ $2,67 per litre.
High-Octane 97 Gasoline: $10,82 dollars per gallon.
A large SUV would fill up for a $292.56. The exchange rate I used is: $1=TL 1.24.
So, stop complaining please